Listar por tema "Nebulosas"

Mostrando ítems 1-14 de 14

    • Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations 

      Dors Júnior, Oli Luiz; Storchi-Bergmann, Thaisa; Riffel, Rogemar André; Schmidt, Alex Andre (2008) [Artículo de periódico]
      Aims. We derive the age and metallicity of circumnuclear star formation regions (CNSFRs) located in the spiral galaxies NGC6951 and NGC1097 and investigate the cause of the very low equivalent widths of emission lines found ...

    • A catalogue of dust clouds in the Galaxy 

      Dutra, Carlos Maximiliano; Bica, Eduardo Luiz Damiani (2002) [Artículo de periódico]
      In this study 21 catalogues of dust clouds in the Galaxy were cross-identified by taking into account available properties such as position, angular dimensions, opacity class and velocity. An initial list of ≈6500 entries ...

    • Distribuição de extinção na Galáxia e nas Nuvens de Magalhães 

      Dutra, Carlos Maximiliano (2001) [Tesis]
      o estudo da distribuição de extinção na Galáxia e nas Nuvens de Magalhães é feito através da análise dos mapas de avermelhamento derivados da emissão 100f-Lmda poeira E(B- V)FIR de Schlegel et ai. (1998). Comparamos valores ...

    • Estágios iniciais de aglomerados estelares 

      Soares, Jules Batista (2005) [Tesis]
      Analisamos aglomeradosimersosem nuvens moleculares, os quais são fundamentais para a compreensão dos estágios evolutivos iniciais da formação estelar. Na presente tese exploramos principalmente objetos associados a nebulosas ...

    • Estudo do meio interestelar através de estrelas anãs brancas 

      Manganelli, Marcos Rodrigues (2012) [Tesinas de grado]
      A luz emitida pelas estrelas é espalhada pelas partículas do meio interestelar ao se propagar através dele. Isso causa a extinção da luz e deixa os espectros observados “mais avermelhados”. A extinção deve ser levada em ...

    • A method for simultaneous determination of A/sub v/ and R and applications 

      Ducati, Jorge Ricardo; Ribeiro, Daiana; Rembold, Sandro Barboza (2003) [Artículo de periódico]
      A method for the simultaneous determination of the interstellar extinction (AV) and of the ratio of total to selective extinction (R), derived from the 1989 Cardelli, Clayton, & Mathis fitting of the interstellar extinction ...

    • Mortality and dust expulsion in early phases of stellar clusters : evidence from NIR photometry of nearby, spiral galaxies 

      Grosbol, Preben; Dottori, Horacio Alberto (2013) [Artículo de periódico]
      Context. It is often argued that young stellar clusters suffer a significant infant mortality that is partly related to the expulsion of dust and gas in their early phases caused by radiation pressure from hot stars and ...

    • New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS 

      Bica, Eduardo Luiz Damiani; Dutra, Carlos Maximiliano; Soares, Jules Batista; Barbuy, Beatriz (2003) [Artículo de periódico]
      We carried out a survey of infrared star clusters and stellar groups on the 2MASS J, H and Ks all-sky release Atlas in the Northern and Equatorial Milky Way (350◦ < < 360◦, 0◦ < < 230◦). The search in this zone complements ...

    • A new luminous blue variable : R143 in 30 Doradus 

      Parker, Joel Wm.; Clayton, Geoffrey C.; Winge, Claudia; Conti, Peter S. (1993) [Artículo de periódico]
      We have discovered that R143 in the Large Magellanic Cloud is a luminous blue variable (LBV), the first and perhaps the lone LBV in the central cluster of 30 Doradus, and only the sixth known LMC LBV. Photo­ metric and ...

    • On the crucial cluster Andrews-Lindsay 1 and a 4% distance solution for its planetary nebula 

      Majaess, Daniel J.; Carraro, Giovanni; Moni Bidin, Christian; Bonatto, Charles Jose; Turner, D. G.; Moyano, Maximiliano; Berdnikov, L.; Giorgi, Edgard Ervar (2014) [Artículo de periódico]
      Andrews-Lindsay 1 is a pertinent open cluster because it may host the planetary nebula (PN) PHR 1315-6555, yet ambiguities linger concerning its fundamental parameters (>50% scatter). New multiband BVJHW1−4 photometry for ...

    • Photometric and spectroscopic study of low mass embedded star clusters in reflection nebulae 

      Soares, Jules Batista; Bica, Eduardo Luiz Damiani; Ahumada, Andrea Veronica; Claria Olmedo, Juan Jose (2005) [Artículo de periódico]
      An analysis of the candidate embedded stellar systems in the reflection nebulae vdBH-RN 26, vdBH-RN 38, vdBH-RN 53a, GGD 20, ESO 95-RN 18 and NGC 6595 is presented. Optical spectroscopic data from CASLEO (Argentina) in ...

    • A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. II. The Large Magellanic Cloud 

      Bica, Eduardo Luiz Damiani; Schmitt, Henrique Roberto; Dutra, Carlos Maximiliano; Oliveira, Humberto Luz (1999) [Artículo de periódico]
      A survey of extended objects in the Large Magellanic Cloud was carried out on the ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogs and searching for new objects. The census provided 6659 objects ...

    • A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. I. Small Magellanic Cloud and bridge 

      Bica, Eduardo Luiz Damiani; Schmitt, Henrique Roberto (1995) [Artículo de periódico]
      A survey of extended objects in the Magellanic System was carried out on the ESO ISERC R and J Sky Survey Atlases. The present work is dedicated to the Small Magellanic Cloud and to the inter-Magellanic Cloud region ...

    • The embedded star clusters in the nebulae NGC 2327 and BRC 27 in Canis Majoris R1 

      Soares, Jules Batista; Bica, Eduardo Luiz Damiani (2002) [Artículo de periódico]
      We employed J, H and Ks photometry from the 2MASS Catalogue to study the embedded star clusters in the nebulae NGC 2327 and BRC 27 locate in the molecular cloud Canis Majoris R1. We made use of colour-colour and colour-magnitudes ...